They look great! Hope you'll enjoy them.
Snow thrown up on the butt/legs is a "feature" of snowshoeing. Many winter pants and tights have wind- or waterproof fronts and breathable backs, which works well for skiing and running, but not so well for snowshoeing. We have some "waterproof" MEC tights that are a lightweight softshell fabric that doesn't collect snow as easily. I usually wear lightweight long johns underneath and often windproof briefs too, since my outer tights are more likely to get damp when snowshoeing. I think ours are considered to be cycling tights, which makes sense since a winter bike commuter could get the fronts and backs of his legs wet, although he would still have a drier butt than a snowshoer!
I will get good use out of them. It is certainly plenty good as a workout with so much unused snow right out the door. I'll bring them over some time if you or 'Bent want to give them a try. I think they have a slightly bigger foot printbthan the Atlas that came over here. I like the feel of these a bit better, but that might be the result of taking the time to place my foot properly in the harness.
Sure, it would be fun to try them! A number of local runners have them but I haven't put them on.
I've never tried Dions but heard nothing but great reports.
The tights are MEC Adanac. They are da bomb for snowshoeing and winter riding. I use them as heavy-rain pants for running and paddling too. For the big race in the Alps I sealed the seams and also had Manisa add 2 zippered hand pockets. I should buy a second pair in case they discontinue them.